Improvement in dies for pressing paper vessels



l/lfz'imsses.

- J. sTEv ENs, Die for Pressing P aper Vessels, &c.

No. 203,670. Patented May 14, I878.

l/ l I l- 66 NITEDFS TAT-ES PATENT CFFIGE.

JOHN s r-Evens, or ron'r BYRON, NEW YORK.

lMPRQVEMENT-lN-Dl-ES FOR PRESSINGPAPER'VE SSELS,Boo.

s scmcsesn forming-part of Letters rim N61 aoaevo, dated May 14', 187.8 application {use June 26,1876. t

To allwhomitmag'cmcem." r Beit known that I, JOHN STEVENS, of Port Byron, inthe county of Cayuga and State of New York, have invented. a certain new-and useful Improvement in Dies for Pressing Paper Vessels andI do hereby declare that the following is a ,full, clear, and exact description .of the construction and operation of the same,

reference being'had to the accompanying draw ings, in which- A Figure 1 is a" central vertical section, showing the two parts of the die separated, the

layers of'cloth and pasteboard being laid over 3 the lower half and secured by the ring. Fig. 2 is aplan of the lower half of the die.- Fig.

gis'a sectionofa paper vessel pressed by the re. p

My improvement relates to pressing open vessels, such j as wash-basins, milk pans,

from pasteboardr The invention consists in the combination, with a die for. pressing the vessels, of 'covering-sheets of cloth embracing the pasteboard,

and a ring securing the said sheets to the lower half. of the die, and so arranged that when pressure is applied by the upper half of the die upon the saidsheets the ring will allow the sheets to rise, to preventundue strain and obviate puckering or wrinklingo'f the pressed pasteboard.

A represents the upper, and die. Theseare made from anysuitablewood, but hard woodis preferable, as the closer the grain the better will bethe surface of theves se The matrix' a and form are upon. the ends of thedies, so as to present the ends v of the grains to the pressure. These parts are turned of any desired form, according-to. the

kind of vessel to be produced;

0- c are strong iron. hoops, which encirclethe dies and prevent them from splitting or crushing under pressure. d .d are two layers of cloth, which are placed over the top of the I I lower die, with the piece f of pasteboard'between them. These sheets 'are all made of greater diameter than the die, so that their edges can be turned down around the lower die, as shown. I An iron ring, 0, is then slipped down over the edges to fasten them in the lower,

place to the die. To make the ring tighten,

straightened over the top of the lower die, as shown in Fig. 1.

are forced down into the compressed.

ing calendered, in which conditionit stretches considerably. v As the follower goes down, the edges of the sheets embraced'by the ring will rise to .a certain extent under the tension, carstraight at all times. J p

In use the dies are kept wet. The sheets of cloth and pasteboard are. also wet. Under the heavy pressure necessary to'form the vesthe wood, followin"g the This I have demonstrated by a large manufacture of the [in a sheet through the top of the die and rum ning ofi'.. The finer-grained hard woods I have found best for the purpose. V i

Another advantage of this invention is that covered with-wire-g'auze to receive the pulp.

whole surface and leaves no irregularities.

sides of vessels may be arranged for use without diffioulty. What'I claim herein as new'isd, and the ring (3, the said sheetsinclgsing the top of the die should be veryslightly bev eling. When thus attached .the sheets are Thelupper die is now brought down with I force, and the three sheets'of paper and cloth matrix and heavily j The pasteboard is usedi'roin thewet'sheet as produced by the paper-machine before berying the ring with them; but the resistance ad which forms the tension of the ring keeping the edges sel the water will pass through the-pores 'ofvessels, the-water underpress'ure passing uP-i a' flnersurfaceis produced upon the vessel thancan be produced by iron iorms,-the latter having to be grooved or cut with water- I channels to' allow escape of water, and: then The fine close grain of the wood covers the Theabovedescribes 'single-actingdies'. Qom-= pound-acting 'dies for pressing the bottom and The combination of the die B, the sheets d 9 v seemro the pasteboard betweem' them and resting over witness whereof I have hereunto signed the edges of the lower half of the die, and bemy name in the presence of two subseribinez ing held loosely thereto by the ring, the whole witnesses.

arranged as described, so that as pressure .is appliedby the upper half of the die the ring J OHN STEVENS.

' willproduee suificient tensionnpon the sheets to prevent puckering or wrinkljng but will -Witnesses:

relax sufliciently to prevent strain or tearing, RF. Oseoon,

as specified. EDWIN Sco'r'r. 

